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Accident
Last updated: 12 December 2017
Status:Definitief
Datum:maandag 17 december 1973
Tijd:15:43
Type:Silhouette image of generic DC10 model; specific model in this crash may look slightly different
McDonnell Douglas DC-10-30
Luchtvaartmaatschappij:Iberia
Registratie: EC-CBN
Constructienummer: 46925/87
Bouwjaar: 1973
Aantal vlieguren:2016
Motoren: 3 General Electric CF6-50C
Bemanning:slachtoffers: 0 / inzittenden: 14
Passagiers:slachtoffers: 0 / inzittenden: 154
Totaal:slachtoffers: 0 / inzittenden: 168
Schade: Afgeschreven
Gevolgen: Written off (damaged beyond repair)
Plaats:Boston-Logan International Airport, MA (BOS) (   Verenigde Staten)
Fase: Landing (LDG)
Soort vlucht:Internationale lijnvlucht
Vliegveld van vertrek:Madrid-Barajas Airport (MAD/LEMD), Spanje
Vliegveld van aankomst:Boston-Logan International Airport, MA (BOS/KBOS), Verenigde Staten
Vluchtnummer:IB933
Beschrijving:
The DC-10 approached Boston runway 33L in bad weather (rain, fog, 1.2 km visibility). The aircraft struck approach lights 500 feet short of the threshold and collided with a dyke. The right main gear was sheared off, the aircraft then skidded and came to a rest 3000 feet from the threshold.

Probable Cause:

PROBABLE CAUSE: "The captain did not recognize, and may have been unable to recognize, an increased rate of descent in time to arrest it before the aircraft struck the approach light piers. The increased rate of descent was induced by an encounter with a low-level wind shear at a critical point in the landing approach where he was transitioning from automatic flight control under instrument flight conditions to manual flight control with visual references. The captain's ability to detect and arrest the increased rate of descent was adversely affected by a lack of information as to the existence of the wind shear and the marginal visual cues available. The minimal DC-10 wheel clearance above the approach lights and the runway threshold afforded by the ILS glide slope made the response time critical and, under the circumstances, produced a situation wherein a pilot's ability to make a safe landing was greatly diminished."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 11 months
Accident number: NTSB/AAR-74-14
Download report: Final report


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NTSB issued 7 Safety Recommendations

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photo of McDonnell Douglas DC-10-30 EC-CBN
photo of McDonnell Douglas DC-10-30 EC-CBN
photo of McDonnell Douglas DC-10-30 EC-CBN
photo of McDonnell Douglas DC-10-30 EC-CBN
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Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Madrid-Barajas Airport en Boston-Logan International Airport, MA bedraagt 5435 km (3397 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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